False Note

Book 19 in the EJ12 Girl Hero series.
When priceless violins are stolen, SHINE suspects evil agency SHADOW is orchestrating something big. But how did the thief just walk out without anyone stopping her? Special Agent EJ12 and the STAR team must work in concert to find out. That's the easy part.
As EJ12, Emma Jacks can do anything. So why does she find doing her school passion project so hard?